Network Model-Connectivity 上洋充通大学 SHANGHAI JIAO TONG UNIVERSITY g(r) 8(r) O 几，灵4， Fundamental Relationship between Node Density and Delay in Wireless Ad Hoc Networks with Unreliable Links 99    I    I L      L Network Model-Connectivity g r( ) g r( ) O r0 r Fundamental Relationship between Node Density and Delay in Wireless Ad Hoc Networks with Unreliable Links